How to prevent JSR from transforming import paths?

[CreepGin]

I'm trying to convert some existing repos to be compatible with JSR, but am running into 2 issues.

jsr publish is prepending "./" to global module import paths. It's turning

import { float4 } from "Unity/Mathematics"

into

import { float4 } from "./Unity/Mathematics"

---

Also, it's appending ".ts" to relative import path, automatically turning

export { palettes } from "./color-palettes"

into

export { palettes } from "./color-palettes.ts"

---

I'm sure there're good reasons for this, but is there any way to prevent it?

[marvinhagemeister]

1. That's a bug
2. That's expected. Per specification ESM import specifiers must have a file extension at the end.

Creating an issue out of the first one

[CreepGin]

@marvinhagemeister Thx! So a follow-up question for 2):

The consumer of my package will get the An import path can only end with a '.ts' extension when 'allowImportingTsExtensions' is enabled. error. But enabling allowImportingTsExtensions will also require either 'noEmit' or 'emitDeclarationOnly'.

Looking at the issue here: microsoft/TypeScript#27481

Is fix-tsc-es-imports the only way forward?

[marvinhagemeister]

That sounds like a bug. For the npm package we rewrite those .ts extensions to something node can understand. Would you mind sharing which package you're testing with?

[CreepGin]

Sure, it's https://jsr.io/@onejs/core It's meant to be run inside a custom environment (Unity). The responsible file is utils/index.ts. Consumer of the package typically have a tsconfig.json like this:

{
    "compilerOptions": {
        "baseUrl": ".",
        "paths": {
            "*": [
                "*"
            ]
        },
        "target": "esnext",
        "module": "esnext",
        "moduleResolution": "node",
        "sourceMap": true,
        "strictNullChecks": true,
        "skipLibCheck": true,
        "jsx": "react",
        "jsxFactory": "h",
        "jsxFragmentFactory": "Fragment",
        "lib": [
            "esnext"
        ],
        "typeRoots": [
            "./node_modules/@types"
        ],
        "outDir": "@outputs/tsc"
    }
}